I made the first draft of the specification [1]. If more people are interested in this I'll move it on Meta.
[1] - http://millosh.wordpress.com/2007/10/14/organizational-and-technical-specifi...
I squatted Wikidata page on Meta [1] and added there a summary of present projects, needs etc. for which I know (or remembered).
This field is very complex, needed, but neglected on Wikimedia projects (exception is French Wikipedia).
For now, it is a summary page. However, I hope that it will initiate a real organized work on this issue.
wiki-research-l@lists.wikimedia.org